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Fig. 7A. —Measured signal-to-noise ratio (SNR) versus concentration of gadodiamide in normal saline, with curves scaled to equal peak heights for 1.5 and 3 T. T1-weighted spin-echo sequence, TR/TE of 700/14 (A) and T2-weighted spin-echo sequence, 4,000/45 (B). Note shift of peak to lower concentrations at 3 T for T1-weighted sequence.